A/2019 G2
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	6 Dec 2019	20.7	2.311 AU	1.927 AU	10h59m	+33°35'	99.9°	24.8°	290°
Nearest approach	9 Jan 2020	19.8	2.344 AU	1.466 AU	08h19m	+54°51'	145.5°	13.7°	204°
Today	8 Apr 2026	29.0	17.147 AU	18.013 AU	23h49m	-14°53'	29.2°	1.6°	223°

The interactive orbit chart above shows the comet's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

Light curve

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS. The displayed light curve is calculated under the assumption that the object remains inactive. (H=16.30; G=.15).

Charts

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.

The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

Orbital elements

The orbital elements of A/2019 G2 are:

    e (Eccentricity)                : 0.9943400
    q (Perihelion distance)         : 2.3106730
    i (Inclination)                 : 159.27290
    Ω (Longitude of ascending node) : 208.28190
    ω (Argument of perihelion)      : 82.88050
    L (Longitude of perihelion)     : 125.88850
    B (Latitude of perihelion)      : 20.56003
    T (Time of perihelion passage)  : 2458823.61260
    P (Orbital period in years)     : 8248.65

    Epoch                           : 2026 Mar 16
    Reference                       : MPEC 2026-E44

    Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); External (P > 200 years)

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-04-07 00:00 UT   23 48 49.5   -14 54 48    18.015   17.140   28.1    1.6   221   29.0 
2026-04-08 00:00 UT   23 48 59.9   -14 54 09    18.013   17.145   29.0    1.6   222   29.0 
2026-04-08 06:42 UT   23 49 02.8   -14 53 59    18.013   17.147   29.2    1.6   223   29.0 
2026-04-09 00:00 UT   23 49 10.2   -14 53 31    18.011   17.151   29.8    1.7   223   29.0 
2026-04-10 00:00 UT   23 49 20.4   -14 52 55    18.009   17.156   30.7    1.7   224   29.0 
2026-04-11 00:00 UT   23 49 30.6   -14 52 20    18.007   17.161   31.5    1.8   225   29.0 
2026-04-12 00:00 UT   23 49 40.7   -14 51 45    18.004   17.167   32.4    1.8   225   29.0 
2026-04-13 00:00 UT   23 49 50.6   -14 51 13    18.001   17.172   33.3    1.8   226   29.0 
2026-04-14 00:00 UT   23 50 00.5   -14 50 41    17.998   17.178   34.1    1.9   227   29.0 
2026-04-15 00:00 UT   23 50 10.3   -14 50 11    17.995   17.183   35.0    1.9   227   29.0 
2026-04-16 00:00 UT   23 50 20.0   -14 49 41    17.991   17.188   35.9    2.0   228   29.0 
2026-04-17 00:00 UT   23 50 29.6   -14 49 14    17.987   17.194   36.7    2.0   228   29.0 
2026-04-18 00:00 UT   23 50 39.1   -14 48 47    17.983   17.199   37.6    2.0   229   29.0 

    Terminology:
            
    delta:  distance between comet and earth in AU
    radius: distance between comet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-comet)    
    phase:  phase angle in degrees (angle sun-comet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km      
    

Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet Center)
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.